13930191 has 64 divisors (see below), whose sum is σ = 24883200. Its totient is φ = 7603200.

The previous prime is 13930187. The next prime is 13930229. The reversal of 13930191 is 19103931.

It is not a de Polignac number, because 13930191 - 2² = 13930187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13930391) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 156475 + ... + 156563.

It is an arithmetic number, because the mean of its divisors is an integer number (388800).

Almost surely, 2^13930191 is an apocalyptic number.

13930191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13930191 is a deficient number, since it is larger than the sum of its proper divisors (10953009).

13930191 is a wasteful number, since it uses less digits than its factorization.

13930191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 13930191 is about 3732.3171087141. The cubic root of 13930191 is about 240.6129643949.

The spelling of 13930191 in words is "thirteen million, nine hundred thirty thousand, one hundred ninety-one".